/* ============================================================
   PIANO — Virtual keyboard styling
   ============================================================ */

#piano-container {
  height: 80px;
  flex-shrink: 0;
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  cursor: grab;
}

#piano {
  height: 100%;
  position: relative;
  margin: 0 auto;
}

.piano-key {
  position: absolute;
  top: 0;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  transition: background var(--transition), transform var(--transition);
}

.piano-key.white {
  background: linear-gradient(180deg, #f0f0f0, #d8d8d8);
  border: 1px solid #999;
  z-index: 1;
}

.piano-key.black {
  background: linear-gradient(180deg, #333, #111);
  border: 1px solid #000;
  z-index: 2;
}

.piano-key.active.white {
  background: var(--accent);
  transform: translateY(2px);
}

.piano-key.active.black {
  background: var(--accent);
  transform: translateY(2px);
}

.piano-key-label {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  color: var(--text-muted);
  pointer-events: none;
  user-select: none;
}

.piano-key.white .piano-key-label { color: #888; }
.piano-key.black .piano-key-label { color: #aaa; font-size: 7px; }